EP 1769016 B1 20121024 - A PROCESS FOR A TWO STAGE MELT POLYMERIZATION FOR THE PRODUCTION OF POLYBENZIMIDAZOLE HAVING AN IMPROVED SOLID STATE POLYMERIZATION
Title (en)
A PROCESS FOR A TWO STAGE MELT POLYMERIZATION FOR THE PRODUCTION OF POLYBENZIMIDAZOLE HAVING AN IMPROVED SOLID STATE POLYMERIZATION
Title (de)
VERFAHREN ZUR ZWEISTUFIGEN SCHMELZEPOLYMERISATION ZUR HERSTELLUNG VON POLYBENZIMIDAZOL MIT VERBESSERTER FESTPHASENPOLYMERISATION
Title (fr)
PROCÉDÉ DE POLYMÉRISATION PAR FONTE EN DEUX ÉTAPES POUR LA PRODUCTION DE POLYBENZIMIDAZOLE OFFRANT UNE MEILLEURE POLYMÉRISATION EN PHASE SOLIDE
Publication
Application
Priority
- US 2005020196 W 20050609
- US 88410304 A 20040702
Abstract (en)
[origin: US2006004182A1] A process for the production of high molecular weight polybenzimidazole by one: providing a first reaction vessel; charging the reaction vessel with at least one aromatic hydrocarbon tetraamine, and a heterocylic ring making up the dicarboxylic component; heating the reactants under agitation in a substantially oxygen-free atmosphere with agitation until the agitator torque is about 1.5 times the torque before a rise in viscosity begins; terminating the agitation while continuing to heat the reaction mixture to about 230° C. while allowing the reaction mass to foam; cooling the reaction mass to a friable foamed mass; crushing the friable foamed mass to obtain a ground prepolymer; and two: providing a second reaction vessel, the second reaction vessel being a high intensity reaction vessel; transferring the ground prepolymer to the second reaction vessel; heating the ground prepolymer under agitation to over 315° C. at atmospheric pressure for a time of about 90 minutes.
IPC 8 full level
C08G 69/00 (2006.01)
CPC (source: EP US)
C08G 73/18 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2006004182 A1 20060105; US 7060782 B2 20060613; CN 100580007 C 20100113; CN 1980982 A 20070613; EP 1769016 A1 20070404; EP 1769016 A4 20100217; EP 1769016 B1 20121024; JP 2008505209 A 20080221; RU 2007104017 A 20080810; RU 2343168 C2 20090110; WO 2006014211 A1 20060209
DOCDB simple family (application)
US 88410304 A 20040702; CN 200580022313 A 20050609; EP 05759185 A 20050609; JP 2007519239 A 20050609; RU 2007104017 A 20050609; US 2005020196 W 20050609